I am hoping to read data from an an array buffer but the function glGetBufferSubData doesn't seem to be available in 2.0: https://www.khronos.org/opengles/sdk/docs/man/
I can do other things to the buffer such as determine it's size but I can't figure out how to read the data which I would think would be possible. I can't see any other functions that seem to do this. Is it possible? If so how do I do it.
I can work around this but it involves storing a copy of the buffer at the time of creation and I don't always need to access the buffer's data so I'd like to only do it as and when it is required rather than always.
Thanks.